Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.936 IF 4.936
  • IF 5-year value: 5.615 IF 5-year
    5.615
  • CiteScore value: 4.94 CiteScore
    4.94
  • SNIP value: 1.612 SNIP 1.612
  • IPP value: 4.70 IPP 4.70
  • SJR value: 2.134 SJR 2.134
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 107 Scimago H
    index 107
  • h5-index value: 63 h5-index 63
Discussion papers
https://doi.org/10.5194/hess-2019-36
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2019-36
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 28 Jan 2019

Research article | 28 Jan 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Hydrology and Earth System Sciences (HESS).

Niger discharge from radar altimetry: Bridging gaps between gauge and altimetry time series

Stefan Schröder1, Anne Springer1, Jürgen Kusche1, Bernd Uebbing1, Luciana Fenoglio-Marc1, Bernd Diekkrüger2, and Thomas Poméon2,a Stefan Schröder et al.
  • 1Institute of Geodesy and Geoinformation, University of Bonn
  • 2Department of Geography, University of Bonn
  • anow at: Agrosphere Institute (IBG-3), Forschungszentrum Jülich, 52425 Jülich, Germany

Abstract. The Niger river represents a challenging target for deriving discharge from spaceborne radar altimeter measurements, in particular since most terrestrial gauges ceased to provide data during the 2000s. Here, we propose to derive altimetric rating curves by bridging gaps between time series from gauge and altimeter measurements using hydrological model simulations. We show that classical pulse-limited altimetry (Jason-1 and-2, Envisat, Saral/Altika) subsequently reproduces discharge well and enables continuing the gauge time series, albeit at lower temporal resolution. Also, SAR altimetry picks up quite well the signal measured by earlier altimeters and allows to build extended time-series of higher quality. However, radar retracking is necessary for pulse-limited altimetry and needs to be further investigated for SAR. Moreover, forcing data for calibrating and running the hydrological models must be chosen carefully. Furthermore, stage-discharge relations must be fitted empirically and may need to allow for breakpoints.

Stefan Schröder et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Login for Authors/Editors] [Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Stefan Schröder et al.
Stefan Schröder et al.
Viewed  
Total article views: 494 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
348 140 6 494 6 7
  • HTML: 348
  • PDF: 140
  • XML: 6
  • Total: 494
  • BibTeX: 6
  • EndNote: 7
Views and downloads (calculated since 28 Jan 2019)
Cumulative views and downloads (calculated since 28 Jan 2019)
Viewed (geographical distribution)  
Total article views: 279 (including HTML, PDF, and XML) Thereof 277 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
Latest update: 19 Jul 2019
Publications Copernicus
Download
Short summary
We propose to derive altimetric rating curves by bridging gaps between time series from gauge and altimeter measurements using hydrological model simulations. We investigate several stations at the Niger river, which is a challenging region. We show that altimetry reproduces discharge well and enables continuing the gauge time series, albeit at lower temporal resolution.
We propose to derive altimetric rating curves by bridging gaps between time series from gauge...
Citation